Relativistic equation-of-motion coupled-cluster theory analysis of black-body radiation shift in the clock transition of Zn I

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Bibliographic Details
Main Authors:	Chamoli, Somesh, Mishra, Anmol, Kesarkar, Richa Sharma, Sahoo, B. K., Dutta, Achintya Kumar
Format:	Preprint
Published:	2023
Subjects:	Atomic Physics
Online Access:	Acceder al recurso
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author	Chamoli, Somesh Mishra, Anmol Kesarkar, Richa Sharma Sahoo, B. K. Dutta, Achintya Kumar
author_facet	Chamoli, Somesh Mishra, Anmol Kesarkar, Richa Sharma Sahoo, B. K. Dutta, Achintya Kumar
contents	We have employed equation-of-motion coupled-cluster (EOM-CC) method in the four-component relativistic theory framework to understand roles of electron correlation effects in the $\textit{ab initio}$ estimations of electric dipole polarizabilities ($α$) of the states engaged in the clock transition ($^{1}$S$_{0}$$\rightarrow$$^{3}$P$_{0}$) of the zinc atom. Roles of basis size, inclusion of higher-level excitations, and higher-order relativistic effects in the evaluation of both excitation energies of a few low-lying excited states and $α$ are analyzed systematically. Our EOM-CC values are compared with the earlier reported theoretical and experimental results. This demonstrates the capability of the EOM-CC method to ascertain the preciseness of the black-body radiation shift in a clock transition, which holds paramount importance for optical clock-based experiments.
format	Preprint
id	arxiv_https___arxiv_org_abs_2312_16879
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	Relativistic equation-of-motion coupled-cluster theory analysis of black-body radiation shift in the clock transition of Zn I Chamoli, Somesh Mishra, Anmol Kesarkar, Richa Sharma Sahoo, B. K. Dutta, Achintya Kumar Atomic Physics We have employed equation-of-motion coupled-cluster (EOM-CC) method in the four-component relativistic theory framework to understand roles of electron correlation effects in the $\textit{ab initio}$ estimations of electric dipole polarizabilities ($α$) of the states engaged in the clock transition ($^{1}$S$_{0}$$\rightarrow$$^{3}$P$_{0}$) of the zinc atom. Roles of basis size, inclusion of higher-level excitations, and higher-order relativistic effects in the evaluation of both excitation energies of a few low-lying excited states and $α$ are analyzed systematically. Our EOM-CC values are compared with the earlier reported theoretical and experimental results. This demonstrates the capability of the EOM-CC method to ascertain the preciseness of the black-body radiation shift in a clock transition, which holds paramount importance for optical clock-based experiments.
title	Relativistic equation-of-motion coupled-cluster theory analysis of black-body radiation shift in the clock transition of Zn I
topic	Atomic Physics
url	https://arxiv.org/abs/2312.16879